:root {
  --paper: #fafaf8;
  --surface: #ffffff;
  --ink: #20211f;
  --subtle: #686a64;
  --line: #d9dad5;
  --line-strong: #a9aaa5;
  --accent: #d86b2b;
  --accent-soft: #f5e7dc;
  --negative: #a64040;
  --focus: #3067b8;
  color: var(--ink);
  font-family: Inter, Avenir Next, Avenir, Segoe UI, Helvetica Neue, Arial, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-size: 16px; line-height: 1.45; }
button, input, select { font: inherit; }
button, select { cursor: pointer; }
button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 3px solid rgb(48 103 184 / 28%);
  outline-offset: 2px;
}

.topbar {
  min-height: 68px;
  padding: 14px 28px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: var(--surface);
}
.product-name { color: var(--ink); font-weight: 650; letter-spacing: -.01em; text-decoration: none; }
.topbar-actions, .panel-actions { display: flex; gap: 8px; align-items: center; }
.action {
  min-height: 40px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: transparent;
  color: var(--ink);
  font-weight: 650;
}
.action:hover { border-color: var(--line-strong); }
.action-primary { border-color: var(--ink); background: var(--ink); color: var(--paper); }
.action-primary:hover { background: #383a36; }
.action.is-success { border-color: #267356; background: #267356; color: white; }

.brief-shell { width: min(1020px, calc(100% - 64px)); margin: 0 auto; padding: 64px 0 86px; }
.scenario-setup { padding-bottom: 36px; border-bottom: 1px solid var(--line); }
.setup-heading { display: flex; align-items: start; justify-content: space-between; gap: 32px; }
.setup-heading h2 { margin: 0; font-size: 26px; font-weight: 650; letter-spacing: -.02em; }
.setup-heading p { max-width: 680px; margin: 7px 0 0; color: var(--subtle); }
.edit-view .result-heading { margin-top: 58px; }
.result-heading { display: grid; grid-template-columns: 1.2fr .8fr; gap: 56px; align-items: end; }
.scenario-label { margin: 0 0 12px; color: var(--accent); font-weight: 650; }
.result-heading h1 { margin: 0 0 10px; font-size: clamp(40px, 6vw, 60px); line-height: 1; font-weight: 600; letter-spacing: -.05em; }
.profile-line { margin: 0; color: var(--subtle); }
.annual-total { padding-left: 28px; border-left: 1px solid var(--line); }
.annual-total span, .opportunity-equation span { display: block; color: var(--subtle); }
.annual-total strong { display: block; margin-top: 5px; font-size: clamp(46px, 7vw, 68px); line-height: 1; font-weight: 600; letter-spacing: -.055em; font-variant-numeric: tabular-nums; }

.measure-strip { margin-top: 58px; border-block: 1px solid var(--line); }
.measure-strip dl { margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); }
.measure-strip dl div { min-width: 0; padding: 20px 18px 20px 0; }
.measure-strip dl div + div { padding-left: 18px; border-left: 1px solid var(--line); }
.measure-strip dt { color: var(--subtle); font-size: 13px; }
.measure-strip dd { margin: 7px 0 0; font-size: clamp(19px, 2.2vw, 24px); font-weight: 650; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }

.opportunity-section { padding-top: 54px; }
.opportunity-section h2, .assumptions-panel h2 { margin: 0 0 23px; font-size: 21px; font-weight: 650; }
.opportunity-equation { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 20px; align-items: end; }
.opportunity-equation strong { display: block; margin-top: 3px; font-size: clamp(24px, 3.4vw, 31px); font-weight: 650; font-variant-numeric: tabular-nums; }
.opportunity-equation b { padding-bottom: 5px; color: var(--subtle); font-weight: 400; }
.equation-total { padding-left: 20px; border-left: 1px solid var(--line); }
.opportunity-bar { height: 8px; margin-top: 25px; display: flex; background: var(--line); }
.opportunity-bar span { background: var(--ink); }
.opportunity-bar i { background: var(--accent); }
.opportunity-bar .negative { background: var(--negative); }
.value-loss .scenario-label, .value-loss .annual-total strong { color: var(--negative); }

.assumptions-panel { margin-top: 58px; padding-top: 34px; border-top: 1px solid var(--line); }
.section-title-row { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; }
.section-title-row h2 { margin-bottom: 0; }
.text-action { padding: 4px 0; border: 0; background: transparent; color: var(--subtle); font-weight: 650; text-decoration: underline; text-underline-offset: 3px; }
.section-intro { margin: 7px 0 30px; color: var(--subtle); }
.assumptions-panel h3 { margin: 28px 0 12px; font-size: 15px; font-weight: 650; }
.profile-note { margin: -6px 0 14px; color: var(--subtle); font-size: 13px; }
.profile-editor { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); }
.profile-editor .field { padding: 13px 12px 13px 0; }
.profile-editor .field + .field { padding-left: 12px; border-left: 1px solid var(--line); }
.input-columns { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px; }
.input-table { border-top: 1px solid var(--line); }
.field { min-width: 0; display: grid; gap: 6px; }
.input-table .field { min-height: 62px; padding: 10px 0; grid-template-columns: minmax(145px, 1fr) minmax(150px, .8fr); align-items: center; border-bottom: 1px solid var(--line); }
.field-heading { display: flex; align-items: center; justify-content: space-between; gap: 8px; color: var(--subtle); font-size: 13px; }
.custom-badge { color: var(--focus); font-size: 10px; font-weight: 650; text-transform: uppercase; letter-spacing: .05em; }
.field > input, .field > select, .number-control {
  width: 100%; min-height: 40px; border: 1px solid var(--line-strong); border-radius: 3px; background: var(--surface); color: var(--ink);
}
.field > input, .field > select { padding: 7px 9px; }
.field-help { color: var(--subtle); font-size: 11px; line-height: 1.35; }
.number-control { padding: 0 9px; display: flex; align-items: center; gap: 5px; }
.number-control input { min-width: 0; width: 100%; border: 0; outline: 0; background: transparent; color: var(--ink); text-align: right; font-weight: 650; font-variant-numeric: tabular-nums; }
.number-affix { color: var(--subtle); font-size: 12px; }
.number-affix.suffix { white-space: nowrap; font-size: 10px; }
.field:focus-within > select, .field:focus-within .number-control { border-color: var(--focus); }
.field.invalid .number-control { border-color: var(--negative); }

.switch-row { margin-top: 24px; display: flex; gap: 10px; align-items: start; cursor: pointer; }
.switch-row input { margin-top: 4px; }
.switch-row span { display: grid; }
.switch-row small { margin-top: 2px; color: var(--subtle); }
.validation-notes { margin: 20px 0 0; padding: 13px 18px 13px 34px; border-left: 3px solid var(--accent); background: var(--accent-soft); font-size: 13px; }
.validation-notes li + li { margin-top: 4px; }
.panel-actions { margin-top: 28px; }

.prepare-assumptions { display: block; }
.scenario-setup .prepare-profile-editor { margin-top: 25px; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.scenario-setup .scenario-name-field { grid-column: 1 / -1; max-width: 520px; padding-right: 0; }
.scenario-setup .profile-editor .scenario-name-field + .field { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
.scenario-name-field .field-heading small { color: var(--subtle); font-size: 10px; font-weight: 400; }
.profile-default-bar { margin-top: 22px; padding: 18px 0; border-block: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.profile-default-bar.has-changes { border-left: 3px solid var(--accent); padding-left: 16px; }
.profile-default-bar strong { font-size: 15px; }
.profile-default-bar p { margin: 3px 0 0; color: var(--subtle); font-size: 13px; }
.profile-default-bar .action { flex: 0 0 auto; }
.profile-default-bar .action:disabled { border-color: var(--line); background: transparent; color: var(--subtle); cursor: default; }
.default-details { margin-top: 14px; }
.default-details summary { width: fit-content; color: var(--subtle); cursor: pointer; font-size: 13px; font-weight: 650; }
.default-details-heading { margin-top: 15px; display: flex; align-items: baseline; justify-content: space-between; gap: 24px; }
.default-details-heading p { margin: 0; color: var(--subtle); font-size: 12px; }
.action-small { min-height: 34px; padding: 5px 10px; font-size: 12px; }
.suggestion-list { margin-top: 8px; border-top: 1px solid var(--line); }
.suggestion-row { min-height: 58px; padding: 9px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 18px; }
.suggestion-row > div { min-width: 0; display: grid; grid-template-columns: minmax(180px, .8fr) minmax(220px, 1fr) minmax(210px, 1fr); align-items: baseline; gap: 16px; }
.suggestion-row strong { font-size: 13px; font-weight: 650; }
.suggestion-row span { color: var(--subtle); font-size: 11px; }
.suggestion-row .suggestion-comparison { color: var(--ink); font-variant-numeric: tabular-nums; }
.suggestion-row .action { min-width: 82px; min-height: 30px; padding: 4px 8px; font-size: 11px; }
.suggestion-row .action:disabled { cursor: default; color: var(--subtle); }

@media (max-width: 820px) {
  .brief-shell { width: min(100% - 36px, 1020px); padding-top: 44px; }
  .result-heading { grid-template-columns: 1fr; gap: 30px; }
  .annual-total { padding: 24px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .measure-strip dl { grid-template-columns: repeat(2, 1fr); }
  .measure-strip dl div:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .measure-strip dl div:nth-child(4) { border-top: 1px solid var(--line); }
  .input-columns { grid-template-columns: 1fr; gap: 8px; }
  .profile-editor { grid-template-columns: repeat(2, 1fr); }
  .profile-editor .field:nth-child(3) { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
  .profile-editor .field:nth-child(4) { border-top: 1px solid var(--line); }
  .scenario-setup .prepare-profile-editor { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .scenario-setup .prepare-profile-editor .scenario-name-field { grid-column: 1 / -1; max-width: none; }
  .scenario-setup .prepare-profile-editor .field { padding: 11px 0; border-left: 0; border-top: 1px solid var(--line); }
  .scenario-setup .prepare-profile-editor .field:nth-child(odd):not(.scenario-name-field) { padding-left: 12px; border-left: 1px solid var(--line); }
  .suggestion-row > div { grid-template-columns: 1fr; gap: 2px; }
}

@media (max-width: 560px) {
  .topbar { padding: 10px 14px; align-items: center; }
  .topbar-actions { gap: 6px; }
  .product-name { font-size: 14px; }
  .action { min-height: 38px; padding: 7px 10px; font-size: 13px; }
  .result-heading h1 { font-size: 40px; }
  .opportunity-equation { grid-template-columns: 1fr auto 1fr; }
  .equation-total { grid-column: 1 / -1; padding: 18px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .opportunity-equation b:nth-of-type(2) { display: none; }
  .profile-editor { grid-template-columns: 1fr; }
  .profile-editor .field, .profile-editor .field + .field { padding: 11px 0; border-left: 0; border-top: 0; border-bottom: 1px solid var(--line); }
  .input-table .field { grid-template-columns: 1fr; }
  .scenario-setup .prepare-profile-editor { grid-template-columns: 1fr; }
  .scenario-setup .prepare-profile-editor .scenario-name-field { grid-column: auto; }
  .scenario-setup .prepare-profile-editor .field,
  .scenario-setup .prepare-profile-editor .field:nth-child(odd):not(.scenario-name-field) { padding: 11px 0; border-left: 0; }
  .profile-default-bar, .default-details-heading { align-items: flex-start; flex-direction: column; }
  .profile-default-bar .action { width: 100%; }
  .suggestion-row { grid-template-columns: 1fr; }
  .suggestion-row .action { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}